Winding apparatus



Dec. 3o, 1947.

v. SAGER WINDING APPARATUS Filled Aug. e, 1945 5 sheets-sheet 1 I NVENToR. cro/e 5,4652,

frroeA/Ex 7 DEC. 30, 1947. v SAGER WINDING APPARATUS Filed Aug. 6, 1945 3 Sheets-Sheet 2 INVENTOR.

me 514652, By

Arroewsn Dec. 30 l11947. v. SAGER 2,433,787

WINDING APPARATUS Filed Aug. 6, 1945 l5 Sheets-Sheet 5 [2p/157.4' 76a 5%, ga-5 I N VEN TOR. T/froe SAGE-e,

ArroeA/Ex Patented Dec. 30, 1947 WINDING APPARATUS Victor Sager, Arcadia, Calif., vassgnor to Diesel Filter u-, El

ship

Monte, Cali, a limited partner- Applicaton August 6, 1945, `Serial No. i609,100

v12 Claims.

1944, under `Serial Number 535,590, and entitled Apparatus `for :forming filter elements and the like, apparatus of .the laferementioned type is disclosed. This application rela-tes to improve- .ments in such apparatus.

It .is .an .object ,of this invention to provide vsuch apparatus .capable of producing a lter element `of iinproyed characteristics.

It is another object of .this invention to provide -such'apparatus capable of winding *filter elements of widely varying diameters, such apparatus Abeing adapted to conne the ends of the iilter element v:as .it is Wound, thus contributing to the uniformity of the nished element.

It is another object of vthis .invention to provide such apparatus .especially adapted for Winding large .diameter .-iilter elements.

It is another object of this invention to proyide such apparatus .employing a split apron for supporting the material .to be wound, as it is fed to a movable pressure roller, said apron having a section adjacent the roller which is automatically adjusted with respect to the rollersok as to .be in proper feeding `relation there with for .all .positions of the roller.

This invention possesses. many .other vadvantages and has yother .objects which may be made more leasily apparent from .a consideration of one embodiment Yof the invention. .For this purpose there is shown `a form in the drawings accompanying and forming .part `of the present specification. This form will now -be described in detail, illustrating the general principles of the invention; .but it is to be understood that this detailed ,description is not -to be taken in a limiting sense, since .the `scope of the invention is best .defmedby the appended claims.

vReferring to the drawings.;

Figure 1 vis a longitudinal ,section through a machine, vembodying .the invention, showing a partly wound ,lter A element in elevation;

.Figure 2 is a'plan View o f part of the machine of Figure 1 o nan enlarged scale, and without the lter element;

Figure `3 is a section, 'taken as indicated by lineBf-.B .0f Figure; Y

f1- .iS a .section .similar yto 'Eigure r3, but

.2 showing the parts in a different operating position; l

Figure 5 is a .detail section on a furtherenlarged scale, taken as indicated by line 5-5 of nFigure 2, but showing another operating position of the parts; :and

Figures .6 and 7 are ldetail cross sections taken as indicated .by the -correspondingly numbered lines on Figure 5.

Referring to the drawings, an .apparatus is shown which is quite Isimilar to that disclosed ,in the aforementioned copending application. Thus, referring particularly Ato Figures 3, 4l and A5, a rotatable mandrel ,l is ,shown about which the ltering materialis adapted to be Wound to form the filtering `element F, `shown `as partly formed in Figures 1 `and ,4. A pressure roll 2 is arranged .to compress the .liltering material as it is wou-nd, the roll `2 being forced away from the mandrel I as the winding progresses Aand the diameter of the ltering Velement increases. As disclosed in said .copending application, the ilter element ,F preferably formed of a Vcontinuous layer l.or pack 3 wrapped about a cen tral tubular 4core A mounted on -the mandrel kl (see Figure el.) 'This layer .or pack 3 may .comprise fibrous material such as mixed shredded bres of cotton, wool and sisal in suitable proportions conned within a lporous wrapping of muslin y,or other lsuitable material. y l Y This lter pack ,3 which is in the form .of a long eXible `strip is supported Aand Yguided on a platform .5 for movement toward the mandrel, the left .hand end -of ,the platform being `shown in the drawing. The ,platform .5 terminates a -short vdistance from .the mandrel and pressure roll yI and 2, .the Iintervening spacel being bridged by an apron A(i. The filter pack 3 isadvanced along the tableand aprorn-and fedbetween the mandrel l and pressure roll v2, lwhence `the rotation of the mandrel 4l Winds the pack. The apron .6. is .inclined kdmivuwarsily toward the pressure roll 2.

It will be clear that as the winding .of the filter element ,progresses the diameter of the element will incr-ease, Vand -the pressure vroll 2 will beforced away from the mandrel. I-by ,the increase in the ,distance of the outer surface of theV element Vfrom .the mandrel. It is quite` essential to the production .of a satisfactory lter velement that .the pack 3 be ,fed tothe man'- drel under proper conditions., Thus, the .pack or layer ,3 must be adequately supported as it leaves theapron 5 and passes to .the mandrel and v1101.1. particularly wllnstarting to Wind the element F. It is dimcult to feed the layer 3 straight unless adequate support is provided. If the layer 3 is not started straight it will twist as it is wound, causing the wrapping to become wrinkled and producing an element of irregular shape and non-uniform diameter. Furthermore, the bottom of the layer 3 as it leaves the apron 6 should never be dragged past the edge of the apron, but should be lifted free of the apron.

Accordingly, means are provided so that the conditions under which the layer 3 is fed to the element F are substantially the same, regardless of the diameter of the element. For this purpose, a feed plate 1 is interposed between the end of the apron 6 and the point where the pack 3 is fed to the mandrel I. The feed plate 1 is supported for angular movement about the pressure roll 2 and is arranged to have substantially the same inclination toward the roll 2 for all positions of the roll. In the present instance, the table 1 is shown as being about horizontal or having a zero inclination. However, this is only because a horizontal plate has been found particularly suitable for use with certain types of illter packs, and it might be desirable with other filter packs to variously incline the table 1 toward the roll I, or even to incline it in the reverse direction. Such a change-would require merely a slight alteration in the proportions of the parts.

In winding large filter elements, of for example 14" or more in diameter, it has been found that the pressure roll 2 sometimes has a tendency to distort the element out of round so that the exterior surfaces on the opposite sides of the element are forced outwardly. To prevent undue pressure from this cause on the advancing layer as it leaves the edge of the plate 1, the arrangement is such that the upper surface of the plate is always spaced vertically below the top of the roll 2 by a suitable distance. Furthermore, means are provided whereby this distance may be caused optionally to increase as the pressure roll 2 moves away from the mandrel I.

Referring in detail to the structure, the mandrel I is rotatably supported on a frame I by suitable bearings, one of which is shown at I I, engaging the reduced ends I2 of the mandrel, and is arranged to be driven in a clockwise direction in any desired way as by a motor I3 and a belt transmission I4, suitable control means (not shown) being provided (see Figure 1). As disclosed in said copending application, the mandrel I is arranged for vertical movement out of the bearing II to permit placement of la filter core 4 thereon and removal of the finished filter element F.

The pressure roll 2 is rotatably mounted, as by self aligning bearings I1, on a cradle frame I8 pivotally supported at I9 on the frame I0, to permit movement of the roll 2 toward and away from the mandrel I. Means are provided for controlling the movement of the cradle frame I8 to cause the pressure roll 2 to exert pressure on the layer 3 as it is wound about the mandrel. For this purpose, an arm 20 is provided on the frame I8, carrying an adjustable weight 2| for urging the pressure roll 2 towards the mandrel I. However, as discussed Vin the said copending application, it is preferred that such pressure be caused mainly by restricting the movement of the pressure roll 2 away from the mandrel I in responsek to increasing diameter of the element F as the winding progresses. For this purpose,

mechanism including a hydraulic cylinder 23 is provided for supporting the free end of the cradle frame I8. The cylinder 23 is rockably mounted at its lower end 24 on the frame I0 and has a packed piston 25 slideable therein, a piston rod 25 extending upwardly from the piston to a swinging connection 21 on the cradle I 8.

A bypass connection 28, controlled by a resiliently closed valve 38, connects the spaces above and below the piston. A return by-pass 3| controlled by a check valve 32 is also provided. The cylinder 23 is lled with a suitable liquid, such as light oil, to about the level indicated at 33. The arrangement is such that the liquid trapped below the piston checks downward movement of the piston, the frame I8 and the pressure roll 2, to the rate allowed by escape of the liquid through the by-pass 29 and the Valve 30 to the space above the piston. By adjusting the loading of the valve 36 in accordance with the characteristics of the layer 3 and the speed at which the layer is being wound, the pressure exerted by the roll 2 may be controlled. The piston 25 is movable freely in an upward directionsince the by-pass 3l and check valve 32 permit free return of the liquid to the space below the piston 25.

The apron 6 comprises a at plate 35 with that edge which is adjacent the platform 5 pivotally supported at 3B on the upper end of struts or legs 31, pivoted at their lower ends 38 on the frame I8. The opposite edge of the plate 35 has the feed plate 1 hingedly connected thereto as by hinges 39. The feed plate 1 is supported for angular movement about the feed roll 2, and with its forward edge 'i-a closely adjacent the surface of the roll 2, by a pair of bearing brackets, respectively adjacent the opposite ends of the plate 1, one of such brackets being indicated by the numeral 4e. In this connection it is to be understood that the apron 6 including the feed plate 1, and the frame I8 are substantially symmetrical about the longitudinal center line of the apparatus. Thus, the means for supporting and positioning the feed plate now to be described, and as shown on one side of the apron, is duplicated at the other side. Thus, referring to Figure 2, that half of the apron etc., not shown is a substantial duplicate of that shown.

Each of the bearing brackets 40 includes a hollow hub or ring IIJ-fa adapted to rotatably embrace a cylindrical sleeve or projection I1-a on the bearing I1 and which is coaxial with the roll 2. A horizontally extending support arm l-b and an upwardly projecting control arm 'll-c are formed integrally on the hub dll-a (see Figures 2, 5 and '1). A link 4I is pivotally connected at one end to the arm 48-0 and at its other end to a lug 42 fixed on the frame I0. The arrangement is such that as the cradle frame I8 swings downwardly from the position shown in Figures 1 and 4, to the position shown in Figures 5 and 3, the link 4I swings the bracket 48 about the pressure roll 2 so that the feed plate 1 remains at a substantially constant inclination. Due to the hinged connection 39, the plate 35 is appropriately inclined about the pivots 36 and 38 as the feed plate 1 is moved. In this way, adequate support for the layer offlter material 3 at the start of the winding is assured, and due to the constant inclination of the plate 1, proper feeding of the material 3 to the filter element F as the winding proceeds is assured.

Furthermore, this movement of the plate 1 also maintains the edge or lip 1--a at a substantially constant distance below the top of the roll 2.

ably supported adjacent the table and having a relatively movable extension for feeding work to the pressure roll, and movably connected to the pressure roll, and means controlling the movement of said apron and said extension in accordance with the movement of the pressure roll.

7. In winding apparatus including a work supporting mandrel and a pressure roll for exerting pressure on the work, and a work supporting platform spaced from the mandrel, an apron over which the work is adapted to be fed from the platform to the mandrel, said apron being pivotally supported at that end adjacent the platform and having an extension at its other end for feeding work to the pressure roll, said extension being connected for angular movement about the pressure roll as well as pivotally connected to said apron, and means controlling the movement of said apron and said extension in accordance with the movement of the pressure roll.

8. In winding apparatus including a mandrel adapted to be rotated and about which work is to be'wound and a pressure roll for creating pressure on the workand movable away from the mandrel as the Winding progresses, means forming a surface for supporting the work as it is fed between the mandrel and the pressure roll, means pivotally supporting said surface forming means for angular movement about said roll, and means altering the angular position of said surface forming means in accordance with the position of said roll with respect to the mandrel.

9. In winding apparatus including a mandrel adapted to be rotated and about which work is to be wound and a pressure roll for creating pressure on the work and movable away from the mandrel as the winding progresses, means forming a surface for supporting the work as it is fed between the mandrel and the pressure roll, means pivotally supporting said surface forming means for angular movement about said roll, means altering the angular position of said surface forming means in accordance with the position of said roll with respect to the mandrel, and means for adjusting said angular position independently of the position of said roll.

i 10. In winding apparatus, a rotatable mandrel about which work is to be wound, a pressure roll cooperating with the mandrel for compressing the work on the mandrel and being forced away therefrom as the-winding progresses, surface forming means for supporting the work as it is fed between the mandrel and the roll, laterally spaced guide means on said surface for the work, said means having extensions for guiding the work substantially to the point of pressure application by said roll.

11. In winding apparatus, a rotatable mandrel about which work is to be wound, a pressure roll cooperating with the mandrel for compressing the work on the mandrel and being forced away therefrom as the winding progresses, surface forming means for supporting the work as it is fed between the mandrel and the roll, laterally spaced guide means on said surface for the work, said means having extensions for guiding the Work substantially to the point of pressure application by said roll, and means maintaining said extensions in substantially constant relation with said pressure roll for all positions of the roll.

l2. In winding apparatus, a rotatable mandrel about which work is to be wound, a pressure roll cooperating with the mandrel for compressing the work on the mandrel and being forced away therefrom as the winding progresses, surface forming means for supporting the Work as it is fed between the mandrel and the roll and terminating at a point adjacent the periphery of said roll and angularly spaced about the axis of said roll from a right line joining said aXis and the axis of the mandrel in a direction opposite to that 'in which the roll rotates, and means for altering said angular spacing in response to movement of said roll away from the mandrel.

VICTOR SAGER. REFERENCES CITED The following references are of record in the 

